<?php
/**
 * Created by PhpStorm.
 * User: 颖inv
 * Date: 2016/9/21
 * Time: 19:35
 */
header('Content-type:text/html;charset=utf-8');
?>
<!doctype html>

<html>
<head>
    <title>数学运算</title>
    <style>
        body{background-color: #eeeeee; font-size: 14px;}
        table{*border-collapse:collapse; border-spacing:0; color:#2B2B2B;}
        .bordered{border:solid #DADADA; 1px; background-color: #fff; text-align: center;}
        .bordered tr,td{border: solid #DADADA 1px;padding:10px;}
        .bordered tr:nth-child(5){text-align: right;}
        .bordered tr:nth-child(6){text-align: right}
        .bordered tr:nth-child(1){font-weight: bold;}
        span{color:red;}
    </style>
</head>
<body>
<?php
const DISCOUNT=0.8;
$fruit1='香蕉';
$fruit2='苹果';
$fruit3='橘子';
$fruit1_num=2;
$fruit2_num=1;
$fruit3_num=3;
$fruit1_price=7.99;
$fruit2_price=6.89;
$fruit3_price=3.99;

$fruit1_total=$fruit1_num * $fruit1_price;
$fruit2_total=$fruit2_num * $fruit2_price;
$fruit3_total=$fruit3_num * $fruit3_price;
$total=($fruit1_total + $fruit2_total + $fruit3_total)*DISCOUNT;

$str="<table class='bordered'>";
$str.="<tr><td>商品名称</td><td>购买数量（斤）</td><td>商品价格(元/斤)</td></tr>";
$str.="<tr><td>$fruit1</td><td>$fruit1_num</td><td>$fruit1_price</td></tr>";
$str.="<tr><td>$fruit2</td><td>$fruit2_num</td><td>$fruit2_price</td></tr>";
$str.="<tr><td>$fruit3</td><td>$fruit3_num</td><td>$fruit3_price</td></tr>";
$str.="<tr><td colspan='3'>商品折扣：<span>".DISCOUNT."</span></td></tr>";
$str.="<tr><td colspan='3'>打折后够买商品总价格：{$total}元</td></tr>";
$str.="</table>";
echo  $str;
?>
</body>
</html>
